My heated seats in the front light up but they do not heat. the fuse is not blow

Hello, If the fuse is good, check for power at the heating element(s). If power is present, but the element does not heat, bad element. There should not be bolts missing from the transfer case, but if there were a missing bolt, replacing it may only slow a leak. There has to be a silicone seal between the halves of the transfer case, and once it is broken, the case must be split, and resealed. Let me know if you get power at the element, or not. Also, do not put "miracle sealants" into the transfer case. By that, I mean the bottles of fluid that say they stop leaks. They may even work, but your transfer case will be in jeopardy.